Battery Voltage Monitoring via Direct Charge Transfer
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Solution Overview
Problem
Existing battery voltage monitoring devices face inefficiencies in charge transfer between distant battery cells due to repetitive switching, leading to energy and heat losses, which increases circuit size and reduces charge transfer efficiency.
Innovation Solution
A battery voltage monitoring device that performs direct charge transfers between battery cells located several cells away, using a charge-transfer circuit to bypass intermediate cells and minimize the number of charge transfers, thereby reducing energy and heat losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If battery cells are grouped into blocks to reduce circuit size, then circuit size is reduced, but charge transfer efficiency decreases due to repetitive switching between blocks
Solution Approach 1:
The patent divides the battery pack into multiple blocks, where each block contains several battery cells connected in series. Within each block, a voltage equalization circuit performs charge transfer between cells using a transformer. This segmentation allows the system to handle distant cell equalization through inter-block charge transfer while maintaining efficient intra-block equalization, thus reducing overall circuit size without excessive switching losses.
Solution Approach 2:
The patent introduces block-level intermediate circuits that act as mediators between distant battery cells. When equalization is needed between cells in different blocks, charge is transferred through the block intermediaries rather than directly between distant cells, reducing the number of switching operations and improving charge transfer efficiency while maintaining compact circuit architecture.
2Device complexity
If charge transfer is performed between distant battery cells through sequential adjacent transfers, then circuit complexity is reduced, but energy losses and heat conversion losses increase significantly
Solution Approach 1:
The patent segments the battery system into blocks and implements voltage equalization circuits within each block. This segmentation enables direct charge transfer between distant cells by utilizing inter-block charge transfer mechanisms, thereby reducing the number of sequential switching operations and minimizing energy losses and heat conversion losses while maintaining manageable circuit complexity.
Solution Approach 2:
The patent enables continuous and efficient charge transfer between distant battery cells by establishing direct charge transfer pathways through the block structure. This continuous action approach eliminates the need for multiple sequential charge transfer steps, reducing cumulative energy losses and heat generation during the equalization process.
3Power
If the number of battery cells is increased to meet power requirements, then power output is improved, but overall circuit size becomes larger
Solution Approach 1:
The patent divides a large number of battery cells into multiple blocks, with each block containing several cells connected in series. This segmentation allows the system to achieve high power output through increased cell count while maintaining compact circuit size by performing voltage equalization within each block using local transformers, avoiding the need for a single large-scale equalization circuit.
Solution Approach 2:
The patent implements a modular block structure where each block contains a universal voltage equalization circuit that can handle equalization for multiple cells within that block. This multi-functional design allows the same circuit architecture to be replicated across multiple blocks, efficiently managing large numbers of cells without proportionally increasing overall circuit size.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances charge transfer efficiency by eliminating sequential charge transfers, reducing energy and heat losses, and minimizing circuit size while maintaining effective voltage equalization across battery cells.
Implementation Method 1
a cell-voltage equalizing circuit for performing a direct charge transfer from a first battery cell to a second battery cell that is second or higher adjacent to the first battery cell and has a lower cell voltage than the first battery cell
Data Source
AI summary
A battery voltage monitoring device for efficiently equalizing cell voltages of a plurality of battery cells connected in series through a direct charge transfer between mutually distant battery cells. The device includes a charge-transfer circuit configured to perform a direct charge transfer from a first battery cell to a second battery cell that is fifth or higher adjacent to the first battery cell. This can eliminate charge-transfer losses that would occur during sequential charge transfers between adjacent battery cells, which leads to an efficient charge transfer between mutually distant battery cells.